Biggest reason for this is that Wall Street has noticed the huge cash pile that Apple is just sitting on. A good chunk of their market cap is made up of this cash pile that they are reinvesting through their hedge fund. There's a reason why Amazon keeps going up even though they are barely profitable. Amazon keeps reinvesting their profits into the company's R&D rather than throwing it in the bank.
Interesting chance for a HN gut check: If you were offered $100k of Apple or $100k of Amazon right now, which would you choose? You would have to receive and hold for 10 years. To me, the answer to that is obvious (AMZN), but I'm curious if my intuition matches up with the general opinion. I'm not sure which would be a better sign. ETA: Original intent was to talk about 100k in dollars, not in shares.
I think AAPL have done amazing things the past 10 years, including outstanding hardware & software, perfect marketing, and a great user experience overall. I also think that they have peaked and there is nowhere to go but down. Granted, it will take a long time to hit the bottom, but they will join the ranks of IBM & Microsoft; irrelevant and ignored.